I really don't understand why it became so popular, it's just an ugly bird flying through pipes. Was it the Nintendo 8-bit look giving a nostalgic feel? Was it because using birds in mobile games = instant success? Or was it because the majority of the human population which possess no intelligence needs something to keep their feeble minds occupied? Probably. Anyway, i'm glad it's gone, being the only one not to have it was getting annoying.